The function of graphite in the first atomic reactor was to
A) absorb fast neutrons.
B) slow fast neutrons.
C) emit fast neutrons.
D) moderate uranium isotopes.
E) none of these
Correct Answer:
Verified
Q10: The effect of putting small amounts of
Q11: Which will leak more neutrons,two separate lumps
Q12: Electrical forces inside a nucleus contribute nuclear
A)stability.
B)instability.
C)both
Q13: Three isotopes that undergo nuclear fission are
A)Th-239,U-235,Pu-239.
B)Th-238,U-235,Pu-239.
C)Th-235,U-235,Pu-239.
D)U-233,U-235,Pu-239.
E)none
Q14: When a lump of uranium is broken
Q16: Uranium-235,uranium-238 and uranium-239 are different
A)elements.
B)ions.
C)isotopes.
D)none of these
Q17: U-235 and Pu-239 are both
A)radioactive isotopes.
B)fissionable isotopes.
C)heavier
Q18: A chain reaction grows when the average
Q19: When neptunium emits a beta particle the
Q20: When uranium-238 absorbs a neutron,it
A)fissions.
B)becomes a beta
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